[AArch64][1/10] ARMv8.2-A FP16 data processing intrinsics

[AArch64][1/10] ARMv8.2-A FP16 data processing intrinsics

gcc/
	* config/aarch64/aarch64-simd.md
	(aarch64_<PERMUTE:perm_insn><PERMUTE:perm_hilo><mode>): Use VALL_F16.
	(aarch64_ext<mode>): Likewise.
	(aarch64_rev<REVERSE:rev_op><mode>): Likewise.
	* config/aarch64/aarch64.c (aarch64_evpc_trn): Support V4HFmode and
	V8HFmode.
	(aarch64_evpc_uzp): Likewise.
	(aarch64_evpc_zip): Likewise.
	(aarch64_evpc_ext): Likewise.
	(aarch64_evpc_rev): Likewise.
	* config/aarch64/arm_neon.h (__aarch64_vdup_lane_f16): New.
	(__aarch64_vdup_laneq_f16): New..
	(__aarch64_vdupq_lane_f16): New.
	(__aarch64_vdupq_laneq_f16): New.
	(vbsl_f16): New.
	(vbslq_f16): New.
	(vdup_n_f16): New.
	(vdupq_n_f16): New.
	(vdup_lane_f16): New.
	(vdup_laneq_f16): New.
	(vdupq_lane_f16): New.
	(vdupq_laneq_f16): New.
	(vduph_lane_f16): New.
	(vduph_laneq_f16): New.
	(vext_f16): New.
	(vextq_f16): New.
	(vmov_n_f16): New.
	(vmovq_n_f16): New.
	(vrev64_f16): New.
	(vrev64q_f16): New.
	(vtrn1_f16): New.
	(vtrn1q_f16): New.
	(vtrn2_f16): New.
	(vtrn2q_f16): New.
	(vtrn_f16): New.
	(vtrnq_f16): New.
	(__INTERLEAVE_LIST): Support float16x4_t, float16x8_t.
	(vuzp1_f16): New.
	(vuzp1q_f16): New.
	(vuzp2_f16): New.
	(vuzp2q_f16): New.
	(vzip1_f16): New.
	(vzip2q_f16): New.
	(vmov_n_f16): Reimplement using vdup_n_f16.
	(vmovq_n_f16): Reimplement using vdupq_n_f16..

From-SVN: r238715